the mordant in the gram stain procedure is
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Nursing Elites

NCLEX-RN

NCLEX RN Predictor Exam

1. In the Gram Stain procedure, which component acts as the mordant?

Correct answer: C

Rationale: In the Gram Stain procedure, the mordant is Gram's Iodine. The purpose of the mordant is to form a complex with the crystal violet, enhancing its ability to bind to the cell wall. Crystal violet is actually the primary stain used in the Gram Stain procedure to initially color all cells. Methyl alcohol is the decolorizer that removes the crystal violet from certain cell types. Safranin is the counterstain used to stain those cells that did not retain the crystal violet stain after the decolorization step.

2. Which of the following diseases would require the nurse to wear an N95 respirator as part of personal protective equipment?

Correct answer: D

Rationale: Infections that require airborne precautions necessitate the use of an N95 respirator, a type of mask that filters particles that are 5 micrograms or smaller. Illnesses that require airborne precautions include Measles, Varicella, Severe Acute Respiratory Syndrome (SARS), and tuberculosis. Measles is a highly contagious airborne disease caused by a virus. It can spread through respiratory droplets when an infected person coughs or sneezes. Wearing an N95 respirator helps prevent the nurse from inhaling these infectious particles. Human immunodeficiency virus, Clostridium difficile enterocolitis, and Vancomycin-resistant enterococcus do not require the use of an N95 respirator as they are not transmitted through the air but have other modes of transmission.

3. Which of the following scenarios provides an example of a healthcare professional overcoming a barrier to communication?

Correct answer: B

Rationale: Overcoming barriers to communication in healthcare involves utilizing methods of communication that are accessible and understandable to the recipient. In the scenario provided, writing down instructions for a patient who is hearing impaired is an effective way to ensure clear communication and overcome the obstacle of hearing impairment. This method allows the patient to visually comprehend the information provided. Choice A is incorrect because using a visual aid for a visually impaired patient, not a hearing-impaired patient, would be more appropriate. Choice C is incorrect as raising one's voice does not address the language barrier effectively and may not enhance understanding. Choice D is incorrect as using complex medical terms with a minor may lead to confusion and hinder effective communication.

4. Cheryl M. has a serious swallowing disorder. She has asked you for a glass of water. The doctor has ordered honey thickness liquids for her. Water is not a honey thickness liquid. It is much thinner. What should you do?

Correct answer: D

Rationale: You can give Cheryl the water that she has requested; however, since water is not a honey-thick liquid as ordered by the doctor, you must thicken it with a commercial thickener before giving it to her. This will ensure that the water is at the appropriate consistency for her swallowing disorder. Choices A, B, and C are incorrect: A) Telling the resident she cannot have water is not the best course of action without attempting to modify it first. B) Giving her applesauce instead of water does not address the specific request for water. C) Placing Cheryl on NPO status until midnight is unnecessary and does not address her immediate request for water.

5. When performing a physical assessment, what technique should the nurse always perform first?

Correct answer: B

Rationale: During a physical assessment, the nurse should always begin with inspection. The sequence of techniques for physical examination is inspection, palpation, percussion, and auscultation. These skills are performed in a specific order, except for the abdominal assessment where auscultation precedes palpation and percussion. Inspection allows the nurse to observe and gather initial information without direct contact. It is a crucial step that provides valuable insights before proceeding to palpation, percussion, and auscultation. Therefore, choice B, 'Inspection,' is the correct answer. Choices A, C, and D are incorrect because they should follow inspection in the sequence of a comprehensive physical assessment.

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